Head on a Port or head on a swivel

WTF is head on a port mean? Is that an ‘old english’ thing? Cant find any reference to the thing accept something i found in a line of dialogue on a tvshow (which the guy is probably fake british).

what a mother fucker that thinks he can speak “propa english” and says Oi now and again. plus add “eh?” at the end of sentences.
He thinks he be the english but he’s not!

Have you ever heard of an airport Sonny boy??!!!?? Can’t you put together the context clues

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No, you absolute spanner.

Port as in connector port.